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Northwest Africa 13102
Basic information Name: Northwest Africa 13102
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13102
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 139.3 g
Recommended:  Mesosiderite    [explanation]

This is 1 of 216 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 9 Feb 2020
Writeup from MB 109:

Northwest Africa 13102 (NWA 13102)

(Northwest Africa)

Purchased: 2019 Aug

Classification: Mesosiderite

History: Purchased from a dealer in Zagora, Morocco in August 2019 by Juan Avil├ęs Poblador on behalf of UAlic.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Recrystallized breccia composed of a variety of mineral clasts, some of which are rimmed by apparent reaction assemblages. Predominant component minerals are orthopyroxene (of several distinct compositions, with rare augite inclusions), olivine (of several distinct compositions) and anorthite, together with accessory kamacite (with taenite rims), silica (as acicular grains associated with anorthite), merrillite, chromite and troilite. Some orthopyroxene grains are rimmed by more ferroan orthopyroxene and some olivine grains are rimmed by orthopyroxene.

Geochemistry: Orthopyroxene cores (Fs17.6Wo0.9; Fs25.2Wo2.4; Fs33.7Wo2.3; FeO/MnO = 27-29, N = 3), orthopyroxene rims (Fs31.8-37.5Wo2.6-3.5, FeO/MnO = 25-26, N = 3), pigeonite rim on large orthopyroxene grain (Fs33.4Wo9.4, FeO/MnO = 26), olivine (Fa16.6-16.8; Fa34.4; FeO/MnO = 40-45, N = 3), orthopyroxene rim on magnesian olivine (Fs21.9Wo1.9, FeO/MnO = 25), augite inclusion in orthopyroxene (Fs16.9Wo42.0, FeO/MnO = 21), anorthite (An90.4-95.8Or0.3-0.1, N = 3).

Classification: Mesosiderite.

Specimens: 21.2 g including one polished endcut at UWB; remainder in the collection UAlic.

Data from:
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2019 Aug
Mass (g):139.3
Shock stage:low
Weathering grade:low
Fayalite (mol%):16.6-16.8; 34.4
Ferrosilite (mol%):17.6-37.5
Wollastonite (mol%):0.9-3.5
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.1
Type spec location:UWB
Main mass:UAlic
Comments:Work name JAP19-2; submitted by A. Irving
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
UAlic: Earth Sciences Department University of Alicante San Vicente del Raspeig, Spain (institutional address; updated 9 Feb 2020)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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